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Nb. 6|5,2|4. Patented n'nv. 29,1898.

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MACHINE FOR' CLOSING LOCKING BARS USED IN CONSTRUCTING RIVETLESS PIPES.

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No. 6|5,2|4. Patented Nov. 29, |898.

M. FERGUSON. .MACHINE FUR CLOSING LOCKING BARS USED IN CDNSTRUCTINB RIVE'TLESS PIPES.

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MEPHAN FERGUSON, OF MELBOURNE, VICTORIA.

MACHINE FOR CLOSING LOCKING-BARS USED IN CONSTRUCTING RIVETLESS PIPES.

SPECIFICATION forming part of Letters Patent No. 615,214, dated November 29, 1898. Application filed July 23, 189B. Serial No. 686,707. (No model.)

T0 all whom it muy concern,.- p

Be it known that I, MEPHAN FERGUSON, engineer, a subject of the Queen of Great Britain, residing at the Olderiieet, Collins street, Melbourne, in the British Colony of Victoria, have invented an Improved Machine for Closing the Locking Bar or Bars Used in the Construction of .Certain Kinds of Rivetless Pipes, (for which I applied for a patent in New South Wales, No. 7,958, dated November 2, 1897; in Queensland, No. 4,168, dated November 4, 1897; in South Australia, No. 5,148, dated November 2, 1897; in Tasmania, No. 2,044, dated November 4, 1897; in New Zealand, No. 10,115, dated November 11, 1897; in Western Australia,No. 1,856, dated November 8, 1897; in Victoria, No. 14,729, dated November l, 1897, and in Great Britain, No. 28,805, dated December 6, 1897,) of which the following is a specification.

This invention relates to the manufacture of rivetless pipes from iron or other metal plates by upsetting the edges of such plates and then bending them round to the aro of a circle and securing their edges together by means of an H-shaped locking-bar, which after having been placed in position is closed down over said edges, so as to grip same and form a perfectly-tight joint.

It consists in the machine hereinafter described for effecting the closing of the locking-bar, and has been devised in order to provide a machine which will perform this operation at a minimum expense.

In order that my invention may be clearly understood, I will describe it with the aid of the accompanying drawings, lin which- Figure 1 is a side elevation, and Fig. 2 an end elevation, of my improved machine .for closing two of said locking-bars simultaneously. Fig. 3 is a view, shown partly in side elevation and partly in vertical central section, of a portion of an internal expanding mandrel over which the pipe is placed When the locking-bar is to be closed. Fig. 3 is a similar View of the remaining or right-hand portion of the mandrel shown in Fig. 3. Fig. 4 is an end view of said mandrel, the pipe, together with the locking-bars clamped thereon, being shown in section.

The same letters of reference indicate the same parts in all the figures.

`drel to the opposite end thereof.

A represents a substantial casting supported upon a solid foundation and providedand supported in the casting A is a hydraulic cylinder C, tted with a ram or plunger c',A carrying at its upper end a closing-tool c2 of similar construction to the anvil B. This closing-tool, like said anvil B, is shaped, as illustrated in Figs. 2 and 4, to conform to the required shape into which it is desired to compress the locking-bars D, to be used for holding the upset edges d of the metal sheets forming the main portion of the pipe.

The letters K K indicate the two halves of a temporary clamp,which clamp is employed for holding the parts of the pipe in position about the mandrel to have the locking-bars clamped thereon, the parts K K being applied about the pipe and held together by the bolts 7c k.

E represents a stationary mandrel or tube, over which the plates and locking-bars to be connected together in order to produce the temporarily held in position by clamps or otherwise. The mandrel E is carried upon suitable supports-as F, for instanceand it extends to between the closing-tool c2 and the anvil B. At this end of said mandrel a vertically-sliding closing-tool G is mounted, so that it can be projected through the top of said mandrel until it bears against the under side of the uppermost locking-bar D. A similarly-constructed tool G is secured upon the outside of the mandrel E, immediately under the adjustable tool G. In order that this tool G may be projected when it is desired to close the locking-bars D, a horizontally-sliding block H, having its upper surface inclined, as illustrated at h, Fig. 3, is arranged to slide within the end of the mandrel E and is connected to a rod h', extending along said man- This rod is coupled through the medium of other rods h2 and cross-heads 72,3 to the rod t of a piston I, Working within a hydraulic cylinder t. This cylinder is constructed with hydraulic packing, as shown, and its ends are connected to a hydraulic pump or other convenient source of power -water through the medium of a valve, whereby either of said ends may be pipe are placed, said plates and bars being n IOO supplied with such power-water, while the opposite end is opened to waste. Provision is also made for connecting the ram-cylinder C with the source of power-water, the valve whereby communication is opened and closed thereto being preferably placed alongside ot' the other valve upon one of the supports I11 or in any other position convenient to the operator. These valves being of ordinary construction are not shown in the drawings.

The operation of the machine is as follows: The metal sheets and locking-bars of which the pipe is to be made having been placed in position and clamped together temporarily are slipped over themandrel E between the closing-tools c2 B. Power-water is then supplied to the left-hand end of the cylinder i', the effect being to force back the piston I, and thus through the medium of the rods h2 and 7L drawing back the sliding block II and causing the incline h on its upper surface to force the tool G upward against the top locking-bar, as illustrated in Fig. 4. In this way there will be a rigid resistance-block between the inner faces of the two locking-bars D D. Tater is then allowed to enter the hydraulic cylinder C in order to force the ram c upward, thereby compressing the sides of the locking-bars D onto the thickened edges of the plates and forming a perfectly-water-tight joint. The pressure within the ram-cylinder C is then released, the left-hand end of the cylinder is opened to the exhaust, and powerwater is run into its opposite end, thereby returning the block Il toits inoperative position and allowing the tool G to fall, thus releasing the pipe, which can then be moved forward a few inches by levers or in any other convenient manner, when the operation above described can be repeated, and so on until the closing of the locking-bars has been effected throughout the entire length of the pipe.

Having now particularly described and ascertained the nature of my said invention and in what manner the same is to be performed, I declare that what I claim is A machine for closing locking-bars about the opposing edges of curved plates in the manufacture of rivetless pipes comprising a frame supporting in its upper portion a downward-depending anvil and in itslower portion a ram the plu nger whereof carries an upwardextending closing-tool, a mandrel extending between said anvil and closing-tool and having a vertically-movable closing-tool in line with said anvil and a stationary closing-tool in line with the closing-tool of said plunger, a slide-block in said mandrel having an inclined surface engaging with the bottom of said vertically-,movable closing-tool, means as described for reciprocating said slide-block, and clamps, such as described, for holding the parts of the pipe in position on the mandrel while the locking bars are secured thereon, the combination operating substantially as described.

MEPIIAN FERGUSON. lVitnesses:

EDWARD XVATERs, WALTER SMYTHE BAvsroN. 

